/*
 * Copyright (C) 2005 - 2013 MaNGOS <http://www.getmangos.com/>
 *
 * Copyright (C) 2008 - 2013 Trinity <http://www.trinitycore.org/>
 *
 * Copyright (C) 2010 - 2013 ArkCORE <http://www.arkania.net/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef ARKCORE_GRIDDEFINES_H
#define ARKCORE_GRIDDEFINES_H

#include "Common.h"
#include "NGrid.h"
#include <cmath>

// Forward class definitions
class Corpse;
class Creature;
class DynamicObject;
class GameObject;
class Pet;
class Player;

#define MAX_NUMBER_OF_CELLS     8
#define MAX_NUMBER_OF_GRIDS      64

#define SIZE_OF_GRIDS            533.33333f
#define SIZE_OF_GRID_CELL       (SIZE_OF_GRIDS/MAX_NUMBER_OF_CELLS)

#define CENTER_GRID_ID           (MAX_NUMBER_OF_GRIDS/2)
#define CENTER_GRID_OFFSET      (SIZE_OF_GRIDS/2)
#define CENTER_GRID_CELL_ID     (MAX_NUMBER_OF_CELLS*MAX_NUMBER_OF_GRIDS/2)
#define CENTER_GRID_CELL_OFFSET (SIZE_OF_GRID_CELL/2)

#define MIN_GRID_DELAY          (MINUTE*IN_MILLISECONDS)
#define MIN_MAP_UPDATE_DELAY    50

#define TOTAL_NUMBER_OF_CELLS_PER_MAP    (MAX_NUMBER_OF_GRIDS*MAX_NUMBER_OF_CELLS)

#define MAP_RESOLUTION 128
#define MAP_SIZE                (SIZE_OF_GRIDS*MAX_NUMBER_OF_GRIDS)
#define MAP_HALFSIZE            (MAP_SIZE/2)

// Creature used instead pet to simplify *::Visit templates (not required duplicate code for Creature->Pet case)
typedef TYPELIST_4(Player, Creature/*pets*/, Corpse/*resurrectable*/, DynamicObject/*farsight target*/)
AllWorldObjectTypes;
typedef TYPELIST_4(GameObject, Creature/*except pets*/, DynamicObject, Corpse/*Bones*/) AllGridObjectTypes;

typedef GridRefManager<Corpse> CorpseMapType;
typedef GridRefManager<Creature> CreatureMapType;
typedef GridRefManager<DynamicObject> DynamicObjectMapType;
typedef GridRefManager<GameObject> GameObjectMapType;
typedef GridRefManager<Player> PlayerMapType;

typedef Grid<Player, AllWorldObjectTypes, AllGridObjectTypes>GridType;
typedef NGrid<MAX_NUMBER_OF_CELLS, Player, AllWorldObjectTypes, AllGridObjectTypes> NGridType;

typedef TypeMapContainer<AllGridObjectTypes> GridTypeMapContainer;
typedef TypeMapContainer<AllWorldObjectTypes> WorldTypeMapContainer;

template<const unsigned int LIMIT>
struct CoordPair
{
    CoordPair (uint32 x = 0, uint32 y = 0) :
            x_coord(x), y_coord(y)
    {
    }
    CoordPair (const CoordPair<LIMIT> &obj) :
            x_coord(obj.x_coord), y_coord(obj.y_coord)
    {
    }
    bool operator == (const CoordPair<LIMIT> &obj) const
    {
        return (obj.x_coord == x_coord && obj.y_coord == y_coord);
    }
    bool operator != (const CoordPair<LIMIT> &obj) const
    {
        return !operator ==(obj);
    }
    CoordPair<LIMIT>& operator= (const CoordPair<LIMIT> &obj)
    {
        x_coord = obj.x_coord;
        y_coord = obj.y_coord;
        return *this;
    }

    void operator<< (const uint32 val)
    {
        if (x_coord > val)
            x_coord -= val;
        else
            x_coord = 0;
    }

    void operator>> (const uint32 val)
    {
        if (x_coord + val < LIMIT)
            x_coord += val;
        else
            x_coord = LIMIT - 1;
    }

    void operator-= (const uint32 val)
    {
        if (y_coord > val)
            y_coord -= val;
        else
            y_coord = 0;
    }

    void operator+= (const uint32 val)
    {
        if (y_coord + val < LIMIT)
            y_coord += val;
        else
            y_coord = LIMIT - 1;
    }

    uint32 x_coord;
    uint32 y_coord;
};

typedef CoordPair<MAX_NUMBER_OF_GRIDS> GridPair;
typedef CoordPair<TOTAL_NUMBER_OF_CELLS_PER_MAP> CellPair;
typedef CoordPair<MAX_NUMBER_OF_GRIDS> GridCoord;
typedef CoordPair<TOTAL_NUMBER_OF_CELLS_PER_MAP> CellCoord;

namespace Trinity
{
    template<class RET_TYPE, int CENTER_VAL>
    inline RET_TYPE Compute (float x, float y, float center_offset, float size)
    {
        // calculate and store temporary values in double format for having same result as same mySQL calculations
        double x_offset = (double(x) - center_offset) / size;
        double y_offset = (double(y) - center_offset) / size;

        int x_val = int(x_offset + CENTER_VAL + 0.5);
        int y_val = int(y_offset + CENTER_VAL + 0.5);
        return RET_TYPE(x_val, y_val);
    }

    inline GridCoord ComputeGridCoord (float x, float y)
    {
        return Compute<GridCoord, CENTER_GRID_ID>(x, y, CENTER_GRID_OFFSET, SIZE_OF_GRIDS);
    }

    inline CellCoord ComputeCellCoord (float x, float y)
    {
        return Compute<CellCoord, CENTER_GRID_CELL_ID>(x, y, CENTER_GRID_CELL_OFFSET, SIZE_OF_GRID_CELL);
    }

    inline GridPair ComputeGridPair (float x, float y)
    {
        return Compute<GridPair, CENTER_GRID_ID>(x, y, CENTER_GRID_OFFSET, SIZE_OF_GRIDS);
    }

    inline CellPair ComputeCellPair (float x, float y)
    {
        return Compute<CellPair, CENTER_GRID_CELL_ID>(x, y, CENTER_GRID_CELL_OFFSET, SIZE_OF_GRID_CELL);
    }

    inline CellPair ComputeCellPair (float x, float y, float &x_off, float &y_off)
    {
        double x_offset = (double(x) - CENTER_GRID_CELL_OFFSET) / SIZE_OF_GRID_CELL;
        double y_offset = (double(y) - CENTER_GRID_CELL_OFFSET) / SIZE_OF_GRID_CELL;

        int x_val = int(x_offset + CENTER_GRID_CELL_ID + 0.5);
        int y_val = int(y_offset + CENTER_GRID_CELL_ID + 0.5);
        x_off = (float(x_offset) - x_val + CENTER_GRID_CELL_ID) * SIZE_OF_GRID_CELL;
        y_off = (float(y_offset) - y_val + CENTER_GRID_CELL_ID) * SIZE_OF_GRID_CELL;
        return CellPair(x_val, y_val);
    }

    inline void NormalizeMapCoord (float &c)
    {
        if (c > MAP_HALFSIZE - 0.5)
            c = MAP_HALFSIZE - 0.5;
        else if (c < -(MAP_HALFSIZE - 0.5))
            c = -(MAP_HALFSIZE - 0.5);
    }

    inline bool IsValidMapCoord (float c)
    {
        return finite(c) && (std::fabs(c) <= MAP_HALFSIZE - 0.5);
    }

    inline bool IsValidMapCoord (float x, float y)
    {
        return IsValidMapCoord(x) && IsValidMapCoord(y);
    }

    inline bool IsValidMapCoord (float x, float y, float z)
    {
        return IsValidMapCoord(x, y) && finite(z);
    }

    inline bool IsValidMapCoord (float x, float y, float z, float o)
    {
        return IsValidMapCoord(x, y, z) && finite(o);
    }
}
#endif
